Is it permissible to buy and sell shares of a global Islamic company that asserts on its official website that it does not deal in unlawful matters such as usury?

For the trading of shares of any company to be permissible, its activity must be lawful, and it must avoid শরীʿআ (Sharia) violations such as gharar (excessive uncertainty) and Maysir (gambling), and it must not invest its funds in usurious banks. It is not possible to rule on the aforementioned companies due to ignorance of their system and the extent of their adherence to Sharia guidelines. Therefore, whoever wishes to purchase their shares must verify the availability of these guidelines.